This explanation of the mechanisms of circadian and sleep timing comes from a scientist who has worked all levels of analysis—from molecular to mathematical to epidemiological—and complements our emphasis on the bridge to mental health practice.

In a scientist-journalist collaboration, the authors reveal the vital role of biological clocks, the strategies scientists are using to understand them, and the health risks that arise from malfunctioning clockwork.

This exposition of the internal calendar in plants and animals shows how it is synchronized by passage of the seasons, seasonal adaptations in biology and behavior, and the threat to the system by climate change.

The now classic, but updated, explanation of winter depression cycles, with case histories (including the author’s own) has advice for management—from light therapy to medications to psychotherapy to diet and exercise, and more.

CET is an independent, non-profit professional organization dedicated to education and research on the new environmental therapies. We offer a variety of services, including background information, self-assessment questionnaires, and environmental therapy products.

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